ibl_core

ibl_core is the renderer-agnostic Rust core for the ibl-baker workspace. It owns HDR/EXR input handling, bake pipeline execution, output encoding, and validation logic.

Scope

The crate is responsible for:

• environment source loading for latlong HDR/EXR/LDR inputs and 6-face cubemap sets
• latlong-to-cubemap conversion and cubemap-to-cubemap resampling
• specular prefilter generation
• irradiance generation
• BRDF LUT generation
• mip chain generation
• .ibla container read/write and validation
• KTX2 cubemap export (BC6H + zstd, via the ktx2_writer crate)

It stays independent from renderer-specific runtime upload paths.

Relationship To Other Packages

• crates/ibl_cli exposes the public command-line workflow on top of this crate. See crates/ibl_cli/README.md for CLI options and output format details.
• crates/ktx2_writer is the write-only KTX2 serializer used internally for KTX2 output. See crates/ktx2_writer/README.md for its narrow serialization scope.
• packages/ibla-loader is the parser-only TypeScript reader for .ibla files.
• packages/ktx2-loader is the narrow TypeScript reader for ibl-baker KTX2 cubemap files.

The .ibla binary format is defined in docs/format-spec.md.